PT-2026-51088

CVE-2026-54902

Published

2026-06-19

Updated

2026-08-05

Description by

CVSS 4.0

6.3

Medium

MetricsAV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions Oj versions prior to 3.17.2

Description Oj is a JSON parser and Object marshaller for Ruby. A Use-After-Free issue exists when using the Oj::Parser in SAJ mode. The parser fails to protect cached object keys of 35 bytes or more from garbage collection. If a Ruby callback triggers garbage collection within the hash end function, the key string may be reclaimed while the C parser still maintains a pointer to it. Subsequent access to this freed string value can lead to a segmentation fault, potentially allowing control over the freed memory content.

Recommendations Update Oj to version 3.17.2 or later.

Exploitability

Exploit

Fix

Impacts

Researchers

Vendors